linux-kernel - Re: [PATCH v3 4/5] meson saradc: add channel labels

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Date:   Tue, 4 Jul 2023 04:32:23 +0300
From:   George Stark <gnstark@...rdevices.ru>
To:     Jonathan Cameron <Jonathan.Cameron@...wei.com>
CC:     <jic23@...nel.org>, <lars@...afoo.de>, <neil.armstrong@...aro.org>,
        <khilman@...libre.com>, <jbrunet@...libre.com>,
        <martin.blumenstingl@...glemail.com>,
        <andriy.shevchenko@...ux.intel.com>, <nuno.sa@...log.com>,
        <linux-iio@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-amlogic@...ts.infradead.org>, <kernel@...rdevices.ru>
Subject: Re: [PATCH v3 4/5] meson saradc: add channel labels

On 7/2/23 12:16, Jonathan Cameron wrote:
> On Wed, 28 Jun 2023 01:37:17 +0300
> George Stark <gnstark@...rdevices.ru> wrote:
>
>> Add attribute 'label' to all iio channels.
> Why?  Reasoning is more useful here than a simple statement of 'what'.
Adding labels make sense only for newly-added channels,
base channels' default node names are close enough to datasheet names.
Ack for extending the commit message.
>> Signed-off-by: George Stark <GNStark@...rdevices.ru>
>> ---
>>   drivers/iio/adc/meson_saradc.c | 12 ++++++++++++
>>   1 file changed, 12 insertions(+)
>>
>> diff --git a/drivers/iio/adc/meson_saradc.c b/drivers/iio/adc/meson_saradc.c
>> index b87f05dfb322..85970fe852af 100644
>> --- a/drivers/iio/adc/meson_saradc.c
>> +++ b/drivers/iio/adc/meson_saradc.c
>> @@ -1058,8 +1058,20 @@ static int meson_sar_adc_calib(struct iio_dev *indio_dev)
>>   	return ret;
>>   }
>>   
>> +static int read_label(struct iio_dev *indio_dev,
>> +		      struct iio_chan_spec const *chan,
>> +		      char *label)
>> +{
>> +	if (chan->type == IIO_TEMP)
>> +		return sprintf(label, "%s\n", "temp-sensor");
>> +	if (chan->type == IIO_VOLTAGE)
>> +		return sprintf(label, "channel-%d\n", chan->channel);
>> +	return 0;
>> +}
>> +
>>   static const struct iio_info meson_sar_adc_iio_info = {
>>   	.read_raw = meson_sar_adc_iio_info_read_raw,
>> +	.read_label = read_label,
>>   };
>>   
>>   static const struct meson_sar_adc_param meson_sar_adc_meson8_param = {

-- 
Best regards
George